We have so many amazing e-resources, like this one: Handbook of Birds of the World Alive!
HBW Alive is an online comprehensive reference resource for all the birds of the world. It contains the contents of the acclaimed 17-volume Handbook of the Birds of the World (HBW) Series.
Now as an online project, HBW Alive is a living resource, a new way of learning and interacting with ornithological information. All contents, including texts, maps and artwork are constantly updated through a combination of professional editors and moderated user participation.
You can learn fascinating facts about a wide variety of bird families and species, such as their Taxonomy, Voice, Habitat, Food and feeding, Breeding, Movements, Status and conservation. You can also view detailed illustrations and even listen to bird calls!!!